SMT kusindikiza ngakhale malata zoyambitsa ndi zothetsera

SMT processing adzaoneka ena zoipa khalidwe mavuto, monga kuyimirira chipilala, ngakhale malata, chopanda kanthu solder, zabodza solder, etc.. Pali zifukwa zambiri osauka khalidwe, ngati pakufunika kusanthula enieni mavuto enieni.

Lero ndi inu kuti tidziwitse kusindikiza kwa SMT ngakhale malata zomwe zimayambitsa ndi zothetsera.

Kodi SMT ngakhale malata ndi chiyani?

Kuchokera ku tanthauzo lenileni la lingaliro la malata akhoza kumveka bwino, ndi pafupifupi ziyangoyango moyandikana kuoneka owonjezera malata, mapangidwe kugwirizana, ziyangoyango zosiyana kapena mizere, ndi malata owonjezera olumikizidwa pamodzi, wotchedwanso malata mlatho.

Zotsatirazi ndi za SMT ngakhale zifukwa za malata ndikuwongolera zotsutsana:.

1.Poor adhesion wa solder phala

Solder phala amapangidwa ndi malata ufa ndi flux osakaniza, mu zosapakidwa pamaso ntchito adzaikidwa mu firiji, pamene kufunika ntchito, m'pofunika kulimbikitsa ndi kusonkhezera wogawana pasadakhale, kuoneka ngakhale malata chifukwa osauka mamasukidwe akayendedwe. a phala, mwina kubwerera kutentha kapena oyambitsa nthawi sikokwanira.

Njira zowonjezera

Musanagwiritse ntchito, tenthetsani phala kwa mphindi zoposa 30 ndikuyambitsanso mofanana mpaka phala silikusweka.Mafakitole ochulukirachulukira tsopano akugwiritsa ntchito makabati anzeru a solder phala, omwe amatha kusintha bwino vutoli.

2.Stencil kutsegula sikokwanira mokwanira

Stencil iyenera kugwiritsidwa ntchito pochiza, stencil kwenikweni ndi pcb pad kutayikira, iyenera kupangidwa ndi kukula kwa pcb pad ndi kukula kwake, malo, zolakwika zina zopanga ma stencil, pangakhale mipata yayikulu kwambiri, zomwe zimapangitsa kutayikira kwa kuchuluka kwa kusindikizidwa solder phala kwambiri, pali phala kusintha chifukwa ngakhale malata.

Njira zowonjezera

Stencil iyenera kuyang'aniridwa mosamala motsutsana ndi fayilo ya Gerber, ndipo laser iyenera kugwiritsidwa ntchito kutsegula stencil, pamene kutsegula kwa stencil (makamaka mapepala okhala ndi mapini) ayenera kukhala kotala laling'ono kusiyana ndi pedi yeniyeni.

3.Makina osindikizira a Solder pastekusindikiza, bolodi la pcb likuwoneka lotayirira

PCB ziyangoyango kusindikiza solder phala, kufunika ntchito solder phala yosindikiza makina, solder phala makina osindikizira ali tebulo PCB solder phala kusindikiza ndi demoulding, mu PCB PAD solder phala kusindikiza, PCB ayenera kusamutsa ku tebulo malo otchulidwa, ndi kufunika kwa fixture anakonza pcb bolodi, ngati kutengerapo udindo kupatuka, fixture sanali achepetsa pcb, adzaoneka yosindikiza kuchepetsa, kubala ngakhale malata.

Njira zowonjezera

Pamene kusindikiza solder phala pa solder phala chosindikizira, muyenera debug pulogalamu pasadakhale kuti pcb kutengerapo malo olondola, ndi fixture ayenera nthawi zonse kufufuzidwa ndi m'malo yokonza.

Zomwe zili pamwambazi, pofuna kupewa kupezeka kwa malata ndi makhalidwe ena oipa, ziyenera kuchita ntchito yabwino pakutsimikizira koyambirira, komanso kumbuyo kwa makina osindikizira kuti muwonjezereMakina a SMT SPI kuzindikira, momwe kungathekere kuchepetsa mlingo woipa.

Makhalidwe aNeoDen ND1chosindikizira cha stencil

Sinthani njira yolowera Kumanzere - Kumanja, Kumanja - Kumanzere, Kumanzere - Kumanzere, Kumanja - Kumanja

Njira yopatsira Njira yamtundu wagawo

PCB clamp mode

Mapulogalamu chosinthika kuthamanga kwa zotanuka mbali kuthamanga

Njira:

1. Choseweretsa vacuum pansi pazipinda zonse

2. Vacuum yapansi pa mfundo zambiri

3. M'mphepete loko clamping mbale

Njira yothandizira gulu la maginito, chipangizo chapadera chogwirira ntchito (njira: Grid-Lok)